Assicus (Asicus, Assic) was the first bishop of Elphin, Ireland, and venerated as the patron saint of that place.

[3] Assicus was of the family of Hono, a druid of wealth and influence, from whom Patrick obtained the land.

[3] In the Tripartite Life of St Patrick is stated: Assicus was an expert metal worker, and was also renowned as a bellfounder.

Following the example of their masters, the successors and spiritual children of St. Assicus founded a school of art and produced beautiful objects of Celtic workmanship in the Diocese of Elphin.

[3] Of his last days the following graphic description is given by Archbishop Healy: His feast is celebrated 27 April, as is recorded in the Martyrology of Tallaght under that date.